Taking antibiotics randomly without a prescription, let alone knowing if you need them, is unsafe. One antibiotic doesn’t fit all illnesses. Maybe your sinus infection was viral and the antibiotic you had did nothing, making your body a bit more resistant to antibiotics. That is one reason why we have super-resistant bacterial infections these days.Fun anecdote when I had my chlamydia scare I was given some in case and last winter I had a really bad and painful sinus infection.. I remembered I had these and they cleared it up loll





